Merge branch 'master' of https://github.com/elbertcastaneda/redmine

# By Toshi MARUYAMA (34) and Jean-Philippe Lang (27)
# Via Elbert Castañeda (4) and Toshi MARUYAMA (1)
* 'master' of https://github.com/elbertcastaneda/redmine: (61 commits)
  Slovene translation changed by Zdravko Balorda (#14360)
  fix Latvian "button_log_time" translation by Arnis Juraga (#14346)
  replace "email.yml" to "configuration.yml" in pl.yml (#9996)
  not run Capybara tests on the CI server (#12822)
  prevent UI test failure randomly
  increase Capybara.default_wait_time from 12 to 20 (#12822)
  increase Capybara.default_wait_time from 7 to 12 (#12822)
  shorten comment lines at test/ui/base.rb
  use database_cleaner (#12822)
  prevent UI test failure randomly
  increase Capybara.default_wait_time from 6 to 7 (#12822)
  prevent UI test failure randomly
  prevent UI test failure randomly
  German translation updated by Daniel Felix (#14277)
  increase Capybara.default_wait_time from 5 to 6 (#12822)
  Code cleanup.
  Fixed tests broken by r11965.
  Adds User#builtin_role.
  Preload boards projects.
  Cleanup of finders with :conditions option.
  ...